<div id="massmail">
<h1>Mass mail</h1>
<form action="index.php" method="post">
<fieldset>
<legend>Mass mail</legend>
<div class="campo"><label for="corpo">Inserisci il messaggio:</label><textarea name="corpo"></textarea><div class="risposta"></div></div>
<div class="campo"><label></label><input type="submit" value="Invia" /></div>
<input type="hidden" name="c" value="CAmministratore" />
<input type="hidden" name="a" value="massMail" />
</fieldset>
</form>
<script type="text/javascript">

//Button
$('#massmail input[type="submit"]').button();

</script>
</div>